Why Do Ewes Reject Their Lambs? Causes and Solutions

One of the most frustrating and economically significant problems during lambing season is when a ewe refuses to accept or nurse her lamb. Without the mother’s milk and warmth, a newborn lamb can die within hours from hypothermia, hypoglycemia or dehydration. Understanding why ewes reject lambs and knowing how to intervene effectively can save significant losses in your flock.

The Maternal Bond: How It Forms

Ewes form their maternal bond with their lamb primarily through olfactory recognition — the smell of amniotic fluid and the lamb’s unique scent. This bond is established in a critical window: approximately 2–4 hours after birth.

During this period, the ewe licks the lamb intensively (cleaning and imprinting on the scent), and the lamb must nurse successfully within the first hour. If this bonding window is disrupted — by separation, illness, difficult labor, or management intervention — the maternal bond may fail to form properly.

Main Reasons Ewes Reject Their Lambs

1. Dystocia (Difficult Birth)

A long, exhausting labor leaves the ewe stressed and exhausted. She may be too weak to stand and attend to her lamb, or the trauma of delivery may interfere with normal hormonal release (oxytocin, estrogen) needed to trigger maternal behavior. First-time ewes and older ewes with large lambs are most at risk.

2. Separation After Birth

Any separation during the critical bonding window (first 2–4 hours) significantly increases rejection risk. Common causes of unintended separation:

• Human handling of the lamb (weighing, tagging, treating) without the ewe being present
• Lamb born outside and moved to shelter separately from the ewe
• Multiple lambs born quickly — ewe bonds with first lamb while second goes unattended
• Lamb born in a crowd and walked away from the ewe before bonding is complete

3. Multiple Lambs (Especially Triplets)

Ewes with triplets frequently reject one or more lambs. They have limited milk and may be unable to bond simultaneously with three offspring. The smallest or last-born triplet is most commonly rejected. This is a natural behavior that reduces litter size to what the ewe can realistically support.

4. First-Time Ewes (Hoggets / Ewe Lambs)

First-time mothers, especially those lambed as ewe lambs (first lambing at 12–14 months), have no maternal experience. They may be frightened by the lamb’s contact and movement, reject attempts to nurse, or simply not show normal maternal behavior. The rejection rate in first-time ewes is significantly higher than in adult ewes.

5. Lambing in Crowded Conditions

In crowded lambing yards, ewes that have just lambed may be disturbed by other ewes and move away from their lamb, or another ewe may try to steal the newborn. Stolen or lost lambs become “mis-mothered” — they receive mothering from the wrong ewe while their actual mother fails to bond.

6. Painful Udder (Mastitis or Engorgement)

Ewes with mastitis (udder infection) or severely engorged udders may kick the lamb away when it tries to nurse because nursing is painful. If a previously bonded ewe starts rejecting nursing, check the udder immediately.

7. Weak or Abnormal Lamb

A lamb that is too weak to stand, nurse or respond normally may fail to stimulate the ewe’s maternal response. Similarly, lambs with abnormal smells (e.g., from being handled with gloves, treated with medications, or born malformed) may be rejected.

How to Prevent Ewe-Lamb Rejection

• Use individual lambing pens (jugs): Separate ewes with newborns into small individual pens immediately after birth. This isolates the pair, eliminates competition and distractions, and gives the bond time to form without interruption. Keep pairs in jugs for at least 24–48 hours.
• Minimize intervention during bonding: Resist the urge to handle lambs immediately — only intervene if necessary. If you must tag, weigh or treat a lamb, do so with the ewe watching and within a few minutes.
• Assist slow ewes: If a ewe is ignoring her lamb after a difficult birth, help her by holding her still while the lamb nurses. The act of nursing stimulates oxytocin release, which strengthens maternal behavior.
• Correct environment: Dry, clean, sheltered lambing area with good lighting and minimal disturbance from other animals
• Monitor triplet ewes closely: Be prepared to assist-feed or foster the smallest triplet

Techniques to Re-Establish the Bond

Restraint Method (for Mild Rejection)

Physically restrain the ewe twice daily (or more frequently) and allow the lamb to nurse for 10–15 minutes. Continue for 3–5 days. In many cases, repeated successful nursing eventually triggers full maternal acceptance. Use a headlock or halter in the jug pen.

Scent Masking (Grafting)

To foster an orphaned lamb onto a ewe that has lost her own lamb:

• Rub the orphan lamb with the ewe’s amniotic fluid or with the dead lamb’s skin (if available)
• Apply Vicks VapoRub or similar strong-smelling ointment to the ewe’s nostrils and the lamb’s back — this temporarily masks scent discrimination
• Keep the pair confined in a small pen for 24–48 hours

“Adoption Cradle”

A wooden or metal frame that restrains the ewe’s head while allowing her body freedom of movement — the lamb can nurse freely at any time while the ewe is confined. Less stressful than hand-restraint for both ewe and handler. After 3–7 days of successful nursing, most ewes accept the lamb.

When All Else Fails: Foster or Artificial Rearing

If re-bonding attempts fail after 5–7 days, options are:

• Foster onto another ewe: A ewe that has recently lost her own lamb may accept the orphan using scent masking techniques
• Artificial (bucket/bottle) rearing: Lambs can be successfully raised on commercial lamb milk replacer. Requires 4–6 feedings per day initially, reducing to 2–3 by week 3.
• Mob feeding: In operations with many orphans, group-feeding with automatic lamb feeders is efficient and allows lambs to nurse on demand

Tracking lambing events, rejection incidents, foster pairings and lamb outcomes in OvinApp allows you to identify ewes that consistently have bonding problems — enabling you to make better culling and selection decisions that reduce rejection rates in your flock over time.